Grinding wheel forming and dressing means



Aug. 8, 1944. E. HADDAD 2,355,372

GRINDING WHEEL FORMING AND DRESSING MEANS Filed Feb. 19, 1944 2 SheetS-Sheet l I m'enior" Zialiddad 1944. E. HADDAD 2,355,372

GRINDING WHEEL FORMING AND DRESSING MEANS Filed Feb. 19, 1944 2 Sheets-Sheet 2 :1 ke 24 ,6 I

jfk'g- 7 l 7 I a Inventor 22 Q J/ Y K9 I222? jzzcldag 94% I -Bj 6" v i mm Patented Aug. 8, 1944 UNITED. STATES PA ENT} oFFlcE GRINDING WHEEL FORMING AN D DRESSING MEANS Elie Haddad, Royal Oak, Mich. p g Application February 19, 1944, Serial No. 523,079

4 Claims.

on such a suitably patterned template to accommodate a feeler and tracing finger on the carrier in order to translate the movement def sired to the carrier and then to the tool on said carrier.

In carrying out the principles of the present invention I have added an improvement on the base for coaction with a feeler or tracing finger on the carrier unit, this for purposes of gauging and translating different radii to the work to be acted on by the tool.

The principal improvements reside in the particular construction of the so-called carrier unit, this being provided with a shiftable or adjustable adapter holder for the tracing finger, and there being feeding means on said unit for actuating and regulating the holder.

It is believed too, that novelty may reside in the external and cross-sectional configuration of the carrier unit, this being ribbed on diametrically opposite sides and substantially semi-circular in cross sectional form to facilitate grasping with the hands and maneuvering the same on the ribbed base or platen.

Other features and advantages will become more readily apparent from the following description and the accompanying illustrative drawings.

In the drawings, wherein like numerals are employed to designate like parts throughout the same:

Figure 1 is a top plan view of an assemblage or structure devised and constructed in accordance with the principles of the present invention.

Figure 2 is a vertical section on the plane of the line 2-2 of Figure 1 looking in the direction of the arrows.

Figure 3 is a fragmentary side or edge elevaticnal view showing a special radii cone attachment in place and the manner in which it is approximately used.

movement of the unit 9 by edge of the base are'cylindrical Figure 4 is a perspective view of the adapter slide forming an important part of the carrier for the tool and feeler finger.

Figure 5'is a perspective view of a clip used on the top of'the carrier unit.

Figure 6 is a horizontal section on the plane of the line 6-6 of Figure 2.

The base or platen, which is of heavy durable steel or equivalent material, is of general rectangular form and is denoted by the numeral 1.

'In practice, it is clamped or otherwise secured on an appropriate stationary support (not shown). The upper usable face thereof is finely and otherwise precision finished and is provided with longitudinal parallel grooves 8 defining ribs.

The ribsserve" to adequately and appropriately seat the shiftable tool carrier unit 9 and cuttings and dirt and extraneous matter accumulate in the grooves, keeping the surfaces of the ribs clean and smooth for accurate manipulative hand.

Detachably or otherwise'mounted along one upstanding pegs or' posts I!) having reduced screw-threaded studs H on their upper ends to accommodate knurled clamping nuts I 2, the latter serving to fasten down washers l 3, these for clamping the template [4 in a horizontal position parallel above the ribbed platen surface. It is understood that various patterns are formed along the working edge of the template and at the opposite or outer edge is straight across to facilitate gauging and measuring with requisite degree of accuracy.

The numeral l5 (see Figure 3) comprises a cone-like template which is an added accessory and which is fastened on the base and held in position by a clamping screw or the like l6. Its purpose is for translating predetermined radius measurements from the base to the work (not shown) as somewhat indicated in Figure 3.

The improved hand-manipulated shiftable carrier unit 9 is vertically elongated and is a massive body of steel or the like and is preferably substantially semi-cylindrical in cross-sectional form. Diametrically opposed surfaces or faces are formed with grooves defining perpendicular ribs ll, these to facilitate grasping the device with the fingers and to avoid slippage if the hands are greasy or sweaty. The rear perpendicular surface of this block-like carrier is substantially fiat across as at l8 and on one side is a substantially L- shaped channel or groove l9. In the side diametrically opposite to the flat face l8, that is, the convex front portion, I provide a substantially rectangular recess 20 which constitutes a keyway and serves to accommodate the adapter block 2|. This block is shiftable up and down in the keyway and is formed with a central screw-threaded bore to accommodate the screw-threaded portion 22 of the adjusting rod 23. This rod has its lower end reduced and swivelled in a socket formed in the basal portion of the carrier unit, this as indicated at 24. The upper end of the rod is flanged as at 25 to provide a shoulder and is further provided with a knurled finger-grip or knob 26. A slight mound 2! on the upper end of the carrier unit serves to accommodate a metal clip 28 have. if desired.

ing a notch to embrace the rod between the shoulder 25 and finger knob 26. held in place by fastening screws 29. mend-equipped dressing and forming tool 30 is appropriately mounted in the upper portion of the carrier unit, this in a position to act on the peripheral portion of the grinding wheel W.

Referring to the shiftable adapter block 2! in Figure 4, it will be noted that this is provided with an extension 3| socketed to accommodate the removable feeler and tracing finger 32, the latter being held in place by a set-screw 33.

The block 2| is provided with locking means as shown in Figure 6. This comprises a set-screw 34 threaded into a screw-threaded hole having a pointed inner end coacting with the conical or pointed inner ends of the projectible and retractible locking pins 35, these being mounted in bores at right angles to the set-screw hole. By feeding the coacting wedging points of the respec tive parts 34 and 35 together, the pins 35 are pressed against the walls of the socket 20 to lock the block 2| in position and to avoid slippage once it has been adjusted through the medium of the feed screw 22. p

In practice it is obvious that the feed screw is adjusted in the unit 9 to place the block 2| in a suitable position to coact either with the conical tracer appliance l or the template I4. By pressing the feeler finger against the parts to be traced, the motions thereof are translated through the unit 9 to the cutting tool 30 and then to the This clip is removablyr The dia-' grinding wheel, whereby to either form the edge of the latter or to dress the surface in a well known manner It is thought that persons skilled in the art to which the invention relates will be able to obtion claimed may be resorted to in actual practice,

Having described the invention, what is claimed as new is:

1. In a structural assemblage of the class described, in combination, a base, a tool carrier unit shiftably supported on the surface of the base, a conical template on said base, and a feeler finger carried by said unit and cooperable with the surface of said conical template.

2. In a structure of the. class described, in combination, a base, a hand maneuverable unit shiftably mounted on said base, a conical template on said base, a plurality of posts on said base, a second plate-like template on said base having an irregularly-shaped edge for tracing purposes, a translating and tracing feeler finger adjustably mounted on said unit and selectively engageable with either of the two templates, and a forming and dressing tool on said unit.

3. In a structure of the class described, a ribbed substantially rectangular plate-like base, a conical member supported on said base, .a plurality of posts on said base, and a plate-like template mounted on said posts parallel to and above said base.

4. A tool unit for use in an assemblage of the class described comprising a vertically elongated body of general semi-circular cylindrical form having external gripping ribs, a feeler finger, an adapter block adjustably mounted in said unit, and a cutting tool on said unit.

ELIE HADDAD. 

